Turret tool post for car-wheel lathes



J. o. MACDONALD TURRET TOOL POST FOR CAR WHEEL LATHES I Nov. 29, 1927.

Filed March 19. 1925 V I weft/TOR fiTTOR/IEY Patented Nov. 29, 1927 TAETES hhElhlid 36TH o. Macnonnnn, on nnnnns; ones into, CANADA, ASSJGNOR ro nrnns-nninnnr- Penn seesaw; @nNEW "550 31;, t. at, e CDRPUEA-TION on NEW JERSEY.

mun-BET noonrosr non CAR-WHEEL LATHns:

inmate March 3 .5; seen/revie s This invention rele-tes to turrets land in particular to e tool turret I for car wheel turning lathes.

.A p in ip l V tion is to provide improved p ositionlng and locking means for the turret .pregferahly'in the form of cams snnnlteneonsly rotated and adapted to engage aside surface turret.

' An the bje f; the inv nt on ,i -FP 1 vide gear means for simultaneously 130tet ing and iorcingthe earns intofando it of en-- gage nent with the turret so thattheturret may bequickly Iloclnad inoperative position or unlocked for adjusting it to a new n;

With these and other objectsin view my invention consists in the flfeetures of con,

struction and operation set forth in the following specification and illustrated in the accompanying drawing. e

In the accompanying drawing annexed hereto and forming a part of this specification, 1 have shown my invention e nhoch ied in a tool turret for a car wheel la the,

but it will he understood that the invention. can be otherwise embodied and that, the

drawings are not toloe construed as defining or limiting the scope of the invention,

the claims appended to this specificetion bee ing relied upon for that purpose.

,the drawing;

Figure 1 is aplan view/ of the turret, its

locking means and portions otithe tool slide adjacent thereto.

F 2 is an elevation of the turnet and adjacent parts shown partly in section.

Fig. 3 is a detail plan view of, the turret locking means, the fixed cover plate being removed thereiironi, and 5 Fig. t IS a separate vlew oi an auxiliary cover pla te;

In the ehoveinentioned drawing 1 have shown but one embodiment o lfthe invention which 13 now deemed preferable, but it V s to he understood that changes and modifications Inay he made within the scope of the appended claims without departing from the spirit of the invention.

object of the present invenev 'li 'is n in t b ifil t esin my evention pomp rises the following prmqpnk pelts: first, a tool slide of any 118L 31 or c911 sn n tr e; se a lampin s iidb t screw outstanding therefrom; "third, .lturretro tatahly niounted' on the tool slide about thecentra l" bolt or stud; fonrth rotate hle e n li vingl eccentri p ti ns .a lantetlftd V engage a side wall o fthe turretyfi fith", gears carrying thecagns and adapted to he simulmerely me t b s sfl n at erm m sllth w h; a tlis itli Bil: closing plates for the gears toexclude chips and dirt- Ref irring more in detail to the figures of thefdrawing, I provide a tool slide 10, p0:

ti onsfonly of which are shown. It, will ,e

understood that this tool slide 16 may, he of any preferred construction for the an; ticular objects'or nses .to which the lgithe is to be put and forms no part of the pres 7 cut invention. Near one end of slide 10 is a transversely movable slide 11 preferably engegingn dovetail projection 12; formed on the toolslide 10. Means ere @prov idecl for advancing the first tool slide it) directly toward or iron; then/ erk bejngtiirned and also means are provided for advancing, he r ns e 'se lide ll a eng heP TOj tm 12 formed on the first tool slide; These nce e s ho i h d ing, c pri crews .LLSYnnd' 4: m n y rotatabl re melting; the i above mentioned adjustments, Meu t in t t e s e ely a ju ble s id l-l is aholt or screw 1 5preterably positioned vertically androtatahly mounting a ,teol

turret 16' thereon. The screw 15, as shown 2, is preferablypositioned within a, sleeve1;5 By rotation of the belt or screw 15, as by means of a wrench applied to the s uared upper ,end 17 of this bolt, the turne 16 m y be rc down against th up er surface of the transverse slide 11 to the turret 16 in indexed position, Adapted to he clamped to this turret 16 are tools i different shapes depending upon the particular operationsto which "the lathe is to be put. These tools 19, in the embodiment of the invention shown, are dis; posed upon all sides of the turret, which is of four sided forms In order to position the turret -16 properly for groups of tools 19 on the different sides of the turret, cams 20 are provided which of the turret 16 in any adjusted or indexed position. For this purpose each of the sides of the turret 16 is provided with bearing strips 21 suitably fastened to the turret as by the screws 22 shown. The position of the cams is such that they engage the turret 16 near its corners.

The cams 20 for positioning the turret 16.

have eccentric or spiral portions as clearly shown in Fig. 3 and arecarried upon or maybe formed integrally upon elevated portions of members 23 rotatably mounted adjacent the turret 16 about studs 24in the transverse tool slide 11. Gears 25 are keyed directly to these cam carrying members 23 concentrically thereto which are. in mesh with a third or intermediate .gear 26. By

rotating the intermediate gear 26 by means of a wrench applied to the squared upper The gears 25, however, are entirely enclosed below the cover plate 28 within a recess formed in the transversely adjustable slide 11. In this way all chips and dirt are excluded from these movable parts. To close thearcuate slots 30 to prevent chips and dirt entering but permitting free rotative movements of the cam'carrying members 23, a thin circular plate 31 is mounted for rotation upon the fixed cover plate 28 concentrically of'eaeh of the cam members 23. One rotative cover plate 31 is shown separately in Fig. 4 and is provided with a recess 32, the walls of which closely surround the cam portion 20 of the members 23. By

means-of'lthis plate 31 the arcuate recesses 30 formed in the fixed cover plate 28 are always completely closed with the cam carrying members 23 in any rotative position.

In using the present form of clamping means, to adjust the turret 16 from one position to the other, the intermediate gear 26 is rotated to disengage the cams 20 from one of the bearing strips 21 on one side of the turret 16. The central bolt or screw 15 is then released, thus permitting the turret 16 to be manually rotated to another indexed position. 'VVith the turret 16 in this new rotative position, the intermediate gear 26 is rotated in the opposite direction, thus oscillating the cams 20 simultaneously into engagement with another bearing strip 21 and properly indexing or positioning the turret 16. With the turret 16 in this new indexed or adjusted position, the central bolt or screw 15 is again clamped, so that the turret 16 is indexed and securely locked or clamped in a new operative position, and positively prevented from rotation.

What I claim is:

l. A turret mechanism for lathes comprising in combination, a tool slide, a tool carrying turret rotatably mounted thereon,

gears on the tool slide adjacent the turret, means to simultaneously rotate said gears, raised projections on said gears having cam surfaces thereon at their peripheries where by rotation of the gears engages said cams with a side surface of the turret, and retains the turret against rotation.

2. A turret mechanism for lathes comprisingin combination, a tool slide, a toolcarrying turret rotatably mounted thereon, gears rotatably mounted on the tool slide adjacent the turret, an intermediate gear in mesh with said first mentioned gears, and cams carried by said first mentioned gears whereby rotation thereof will engage said caIns with a side surface of said turret.

3. A turret mechanism for lathes comprising in combination, a tool slide, a tool carrying turret rotatably mounted thereon, gears rotatably mounted on the tool slide adjacent the turret, an intermediate gear in mesh with said first mentioned gears, cams carried by said first mentioned gears whereby rotation thereof will engage said cams with a side surface of said turret, and a cover plate enclosing said gears.

1. A turret mechanism for lathes comprising in combination, a tool slide, a tool carrying turret rotatably mounted thereon,

gears rotatably mounted on the tool slide adjacent the turret, an intermediate gear in mesh with said first mentioned gears, cams carried by said first mentioned gears whereby rotation thereof will engage said cams with a side surface of said turret, and a fixed cover plate enclosing said ears and having arcuate slots through wiich said jaws extend.

5. A turretmechanism for lathes comprising in combination, a tool slide, a tool carrying turret rotatably mounted thereon, gears rotatably mounted on the tool slide adjacent the turret, an intermediate gear in mesh with said first mentioned gears, cams carried by said first mentioned gears whereby rotation thereof will engage said cams with a side surface of said turret, a fixed cover plate enclosing said gears and having arcuate slots through which said jaws extend, and a rotatable cover plate for each cam closing said arcuate slots.

'In testimony whereof, I hereto allix my signature.

JOHN O. MACDONALD. 

